Tuesday, 6 September 2016

Data Structures Interview Questions And Answers

Research here what types of questions can be asked in a computer
programming Interview. Check out here Data Structures Interview Questions And
Answers For Freshers. Data structure is the main part of any programming
language or system and to crack one such interview you need to prepare, you can
also get it download via Online in PDF form. Today, companies need the
candidates whose concept to data structures must be clear in mind.

Candidates, programming skills also improve automatically
with understanding the concept of data structure that is commonly used in the
technical system design. Structures are the main basics of computer programming
like C++. It is one the important theory part for programming related courses.
And every programmer needs be very thorough about the data structures.

In most of interviews related programming, they will ask
questions regarding various data structures. Now let us look into the
questions. So, be prepared with Data Structure interview Questions and
Answers so you can prove yourself as a big competitor. Here you check some
Online PDF link for mostly asked Interview questions on Data Structures. We have provided
the best answers for freshers for the candidates to improve their skills.

Data Structures
Interview Questions And Answers

You need to know about the basic definition and introduction
about Data structure. They will ask like what is Data structure like that. Data
Structures Interview Questions and Answers for Freshers Online PDF –

Ques 1: What is data structure?

Ans. – The study of representation, organization and
processing forms of data is known as Data structure. It is a class of data
which is characterized by its organization and the operations defined on it.

Ques 2: Did Heap and hash table can be
implementing by using an array?

Ans. – Yes, we can implement it.

Ques 3: How to find middle element in linked
list in one pass?

This is a tricky and most confusing question for programmer
as while programming we know to find the middle element we must have to
traverse the linked list at least ones. Then in second pass only pointer can
reach to middle one after traversing it half.

Ans.– You have to take to pointers for it, one will
increment one after another, but the second pointer will increment at half rate
to first one, that means, after two. For example, when first pointer at 7th list
that time second will pointing to 3rd list. And similarly when
it reached to last node of list where it get NULL at the same time second pointer
is pointing to middle node of linked list.

Ques 6: For implementation of priority queue,
what the minimum queue requirement is?

Ans. – Two Queues, one for storing actual data and
one queue for storing the priorities.

Ques 7: How to find if linked list has loop?

Ans. – We can use two pointers for it. One pointer
must contain the starting node address and another node keep incrementing. When
there is a situation first pointer matches to second pointer twice (one at
starting and again after incrementing successively) then it is said that there
is looped lined list.

Ans. – Pool is a list of unused memory cells which
has its own pointer.

Ques 9: Tell the basic difference between Stack
and Queue?

Ans. – There is broad differences in their
structures. Stack use the approach of FILO (First In Last Out). It pops up the
current or last element in the stack. This data structure is having only one
end to (push) insert and same end is used for pop, also called Top of Stack.
Whereas, Queue is totally different, with two end points, one for insertion
i.e. rare and another point is for deletion that is front. Queue uses the
approach of FIFO (First In First Out).

Ques 10: Why the elements of an array are stored
successively in memory cells?

Ans. – Elements stored in an array successively
because by this way computer can keep record of only the address of the first
indexed element and addresses of another item can be calculated by their index
number.

Ques 11: From String, lists and Queue which of
these data structure is linear type data structure?

Ques 15: How to find the 3rd node from the
end in the linked list in one pass?

Ans. – Sir, for this we have to implement two
pointers. First pointer will increment successively one by one. But the second
pointer will start incrementing when the first one is at exactly incremented
third time. Therefore, when the first point reached to the first node of linked
list, at the same point second pointer is exactly pointing to the third node of
the linked list.

Hope these above Interview questions and
answers will help you in your Interview questions and answers… We’ll update
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